Metal alloy.



cm ED STATES PATENT OFFICE.

RICHARD H. PATCH, OF PHILADELPHIA, PENNSYLVANIA.

METAL ALLOY.

No Drawing.-

To all whom it may concern Be it known that I, RICHARD H. PATCH, a citizen of the United States, residing at Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented a new and useful Improvement in Metal Alloys, of which the following is a full, clear, and exact description.

ticularly adapted for use as a substitute for soft iron in electrical machines of all kinds, itsk dynamos, generators, magnets and the I have discovered that, by the addition of cobalt to iron in the proper proportion, an alloy is obtained with magnetic permeability, particularly at high inductions, considerably in excess of the values obtained with materials at present used.

The alloy, in accordance with my invention, contains cobalt and iron in the proportions hereinafter specified, together with manganese.

An alloy which I have found to possess the desired properties is: iron about 65 per cent., cobalt about 34.5 per cent., manganese about .25 per cent.

Given the ingredients above named, to which should be added (say) about .2% of silicon or a proper proportion of some other deoxidizer, with the proportions approximately as stated, any one skilled in the art can produce an alloy with a saturation intensity greater than that obtained with any Specification of Letters Patent.

exceed 1%.

Patented Nov. 30, 1915.

Application filed September 16, 1915. Serial No. 5034?.

material at present used, without the necessity of any experimentation, the ingredients being mixed and the alloy manufactured in no Way diflerentfrom that characterizing the production of other steel alloys and Well known to those skilled in the art.

The proportion of cobalt should not exceed 40%, nor be less than 30%. The percentage of manganese should not exceed 2%, nor be less than 2%. If silicion be one of the ingredients, its percentage should not Carbon will inevitably be present in the iron and in the cobalt, but its proportion should not exceed .4%. The alloy may contain the usual small percentages of natural alloys or impurities, as titanium, phosphorus and sulfur, although these should be reduced to a minimum.

If the alloy contains cobalt' or manganese in excess of the maximum proportion specified, then the magnetic properties are considerably affected, and the alloy becomes much inferior to those alloys obtained by the above specification. The same is true vin case the alloy contains less cobalt than the minimum specified, while if the manganese is reduced, then the material becomes much more diflicult to forge.

Having now fully described my invention, what I claim and desire to protect by Letters Patent is:

1. A metal alloy containing the following ingredients in the proportions specified: iron 60 to 70 per cent., cobalt 30 to 40'per cent., and manganese .2 to 2 per cent.

2. A metal alloy containing he following ingredients in approximately the proportions specified: iron 65 per cent., colbat 34.5 per cent. and manganese .25 per cent.

In testimony of which invention, I have hereunto set my hand, at Philadelphia, on this 14th day of September, 1915.

RICHARD H. PATCH.

Witness:

JAMEs J. RAHILLY. 

